refactor: Impure derivation type isPure -> isImpure

To quote the method doc:

Non-impure derivations can still behave impurely, to the degree permitted
by the sandbox. Hence why this method isn't `isPure`: impure derivations
are not the negation of pure derivations. Purity can not be ascertained
except by rather heavy tools.
This commit is contained in:
Robert Hensing 2024-01-15 08:17:42 +01:00
parent f1b0304153
commit 49b25ea85c
4 changed files with 24 additions and 19 deletions

View file

@ -223,7 +223,7 @@ void DerivationGoal::haveDerivation()
if (!drv->type().hasKnownOutputPaths())
experimentalFeatureSettings.require(Xp::CaDerivations);
if (!drv->type().isPure()) {
if (drv->type().isImpure()) {
experimentalFeatureSettings.require(Xp::ImpureDerivations);
for (auto & [outputName, output] : drv->outputs) {
@ -304,7 +304,7 @@ void DerivationGoal::outputsSubstitutionTried()
{
trace("all outputs substituted (maybe)");
assert(drv->type().isPure());
assert(!drv->type().isImpure());
if (nrFailed > 0 && nrFailed > nrNoSubstituters + nrIncompleteClosure && !settings.tryFallback) {
done(BuildResult::TransientFailure, {},
@ -397,9 +397,9 @@ void DerivationGoal::gaveUpOnSubstitution()
for (const auto & [inputDrvPath, inputNode] : dynamic_cast<Derivation *>(drv.get())->inputDrvs.map) {
/* Ensure that pure, non-fixed-output derivations don't
depend on impure derivations. */
if (experimentalFeatureSettings.isEnabled(Xp::ImpureDerivations) && drv->type().isPure() && !drv->type().isFixed()) {
if (experimentalFeatureSettings.isEnabled(Xp::ImpureDerivations) && !drv->type().isImpure() && !drv->type().isFixed()) {
auto inputDrv = worker.evalStore.readDerivation(inputDrvPath);
if (!inputDrv.type().isPure())
if (inputDrv.type().isImpure())
throw Error("pure derivation '%s' depends on impure derivation '%s'",
worker.store.printStorePath(drvPath),
worker.store.printStorePath(inputDrvPath));
@ -439,7 +439,7 @@ void DerivationGoal::gaveUpOnSubstitution()
void DerivationGoal::repairClosure()
{
assert(drv->type().isPure());
assert(!drv->type().isImpure());
/* If we're repairing, we now know that our own outputs are valid.
Now check whether the other paths in the outputs closure are
@ -1100,7 +1100,7 @@ void DerivationGoal::resolvedFinished()
worker.store.printStorePath(resolvedDrvGoal->drvPath), outputName);
}();
if (drv->type().isPure()) {
if (!drv->type().isImpure()) {
auto newRealisation = realisation;
newRealisation.id = DrvOutput { initialOutput->outputHash, outputName };
newRealisation.signatures.clear();
@ -1395,7 +1395,7 @@ void DerivationGoal::flushLine()
std::map<std::string, std::optional<StorePath>> DerivationGoal::queryPartialDerivationOutputMap()
{
assert(drv->type().isPure());
assert(!drv->type().isImpure());
if (!useDerivation || drv->type().hasKnownOutputPaths()) {
std::map<std::string, std::optional<StorePath>> res;
for (auto & [name, output] : drv->outputs)
@ -1411,7 +1411,7 @@ std::map<std::string, std::optional<StorePath>> DerivationGoal::queryPartialDeri
OutputPathMap DerivationGoal::queryDerivationOutputMap()
{
assert(drv->type().isPure());
assert(!drv->type().isImpure());
if (!useDerivation || drv->type().hasKnownOutputPaths()) {
OutputPathMap res;
for (auto & [name, output] : drv->outputsAndOptPaths(worker.store))
@ -1428,7 +1428,7 @@ OutputPathMap DerivationGoal::queryDerivationOutputMap()
std::pair<bool, SingleDrvOutputs> DerivationGoal::checkPathValidity()
{
if (!drv->type().isPure()) return { false, {} };
if (drv->type().isImpure()) return { false, {} };
bool checkHash = buildMode == bmRepair;
auto wantedOutputsLeft = std::visit(overloaded {

View file

@ -2724,7 +2724,7 @@ SingleDrvOutputs LocalDerivationGoal::registerOutputs()
.outPath = newInfo.path
};
if (experimentalFeatureSettings.isEnabled(Xp::CaDerivations)
&& drv->type().isPure())
&& !drv->type().isImpure())
{
signRealisation(thisRealisation);
worker.store.registerDrvOutput(thisRealisation);

View file

@ -110,17 +110,17 @@ bool DerivationType::isSandboxed() const
}
bool DerivationType::isPure() const
bool DerivationType::isImpure() const
{
return std::visit(overloaded {
[](const InputAddressed & ia) {
return true;
return false;
},
[](const ContentAddressed & ca) {
return true;
return false;
},
[](const Impure &) {
return false;
return true;
},
}, raw);
}
@ -840,7 +840,7 @@ DrvHash hashDerivationModulo(Store & store, const Derivation & drv, bool maskOut
};
}
if (!type.isPure()) {
if (type.isImpure()) {
std::map<std::string, Hash> outputHashes;
for (const auto & [outputName, _] : drv.outputs)
outputHashes.insert_or_assign(outputName, impureOutputHash);

View file

@ -253,12 +253,17 @@ struct DerivationType {
bool isSandboxed() const;
/**
* Whether the derivation is expected to produce the same result
* every time, and therefore it only needs to be built once. This is
* only false for derivations that have the attribute '__impure =
* Whether the derivation is expected to produce a different result
* every time, and therefore it needs to be rebuilt every time. This is
* only true for derivations that have the attribute '__impure =
* true'.
*
* Non-impure derivations can still behave impurely, to the degree permitted
* by the sandbox. Hence why this method isn't `isPure`: impure derivations
* are not the negation of pure derivations. Purity can not be ascertained
* except by rather heavy tools.
*/
bool isPure() const;
bool isImpure() const;
/**
* Does the derivation knows its own output paths?